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Make getOrInsertCanonicalInductionVariable guarantee that its

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result is a PHINode*.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108852 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2010-07-20 16:44:52 +00:00
parent af8e2ef649
commit 7c58dbd88c
2 changed files with 4 additions and 3 deletions
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3
include/llvm/Analysis/ScalarEvolutionExpander.h
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@ -76,7 +76,8 @@ namespace llvm {
/// canonical induction variable of the specified type for the specified
/// loop (inserting one if there is none). A canonical induction variable
/// starts at zero and steps by one on each iteration.
Value *getOrInsertCanonicalInductionVariable(const Loop *L, const Type *Ty);
PHINode *getOrInsertCanonicalInductionVariable(const Loop *L,
const Type *Ty);
/// expandCodeFor - Insert code to directly compute the specified SCEV
/// expression into the program. The inserted code is inserted into the

4
lib/Analysis/ScalarEvolutionExpander.cpp
View File

@ -1349,7 +1349,7 @@ void SCEVExpander::restoreInsertPoint(BasicBlock *BB, BasicBlock::iterator I) {
/// canonical induction variable of the specified type for the specified
/// loop (inserting one if there is none). A canonical induction variable
/// starts at zero and steps by one on each iteration.
Value *
PHINode *
SCEVExpander::getOrInsertCanonicalInductionVariable(const Loop *L,
const Type *Ty) {
assert(Ty->isIntegerTy() && "Can only insert integer induction variables!");
@ -1357,7 +1357,7 @@ SCEVExpander::getOrInsertCanonicalInductionVariable(const Loop *L,
SE.getConstant(Ty, 1), L);
BasicBlock *SaveInsertBB = Builder.GetInsertBlock();
BasicBlock::iterator SaveInsertPt = Builder.GetInsertPoint();
Value *V = expandCodeFor(H, 0, L->getHeader()->begin());
PHINode *V = cast<PHINode>(expandCodeFor(H, 0, L->getHeader()->begin()));
if (SaveInsertBB)
restoreInsertPoint(SaveInsertBB, SaveInsertPt);
return V;